@eslint/css-tree is a fast and spec-compliant CSS parser, validator, and abstract syntax tree (AST) generator. Core to many CSS tooling projects, it empowers developers to analyze, transform, and understand CSS code programmatically. Used extensively within ESLint's CSS-related rules, it provides a robust foundation for identifying style inconsistencies, enforcing best practices, and ensuring CSS code quality. Its versatile API enables custom analysis and manipulation, making it a valuable asset for any project working with CSS.